in Smart Energy Metering Applications
B y P e t r e M i n c i u n e s c u a nd Bri a n Kennedy • a na lo g devi c es
c urrent transforMers that are dc-tolerant have long Been used to sense ac currents in sMart energy Meters, But they have drawBacKs and can Be exPensive. for soMe aPPlications, resistive shunts MaKe Better current sensors as they are inexPensive, highly linear, and iMMune to Magnetic influences. unfortunately, resistive shunts do not Possess the inherent electrical isolation of current transforMers. in aPPlications such as sMart energy Meters that require isolation, digital isolators with isolated Power technology coMBined with shunt resistors offer a good solution to this ProBleM.
46 EDN EUROPE | JUNE 2012
Table of Contents for the Digital Edition of EDNE June 2012